396438862697 has 4 divisors (see below), whose sum is σ = 396489199236. Its totient is φ = 396388526160.

The previous prime is 396438862667. The next prime is 396438862733. The reversal of 396438862697 is 796268834693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 796268834693 = 11261 ⋅70710313.

It can be written as a sum of positive squares in 2 ways, for example, as 90811219801 + 305627642896 = 301349^2 + 552836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396438862697 is a prime.

It is a super-2 number, since 2×396438862697² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396438862697.

It is not an unprimeable number, because it can be changed into a prime (396438862607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25156454 + ... + 25172207.

It is an arithmetic number, because the mean of its divisors is an integer number (99122299809).

Almost surely, 2^396438862697 is an apocalyptic number.

It is an amenable number.

396438862697 is a deficient number, since it is larger than the sum of its proper divisors (50336539).

396438862697 is an equidigital number, since it uses as much as digits as its factorization.

396438862697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50336538.

The product of its digits is 564350976, while the sum is 71.

The spelling of 396438862697 in words is "three hundred ninety-six billion, four hundred thirty-eight million, eight hundred sixty-two thousand, six hundred ninety-seven".